Electric conduit coupling



Oct. 13, 1931. J. w. M COY ELECTRIC CONDUIT COUPLING Filed Aug. 17, 1929 g x a 4W] A N .0w!

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Patented Oct. 13, 1931 UNITED STATES PATENT OFFICE JAY w. uccoY, or smccsn, msw Yonx, Ass xenon 'ro fcnousn-nmns 001mm, or

smcusz, m YORK, a coarom'rro r or new You ELMO OONDUIT COUPLING Application fled August 17, 1929. Serial H0. 886,885.

ples may be rovided in the lateral sides or This invention relates to conduit cou and has for its object a particularly slmp e and eflicient means for coupling two conduit sections, particularly electric conduit sec-.

tions, together whereby the sections can not be unintentionally separated.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth'and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a side elevation, partly in section, of a plurality of conduit sections coupled together and embodying my invention.

Figure 2 is an enlarged fragmentary sectional view of parts seen in Figure 1.

Figure 3 is an end elevation of parts seen in Fi re 2.

igures 4 and 5 are respectively a side elevation and an end view of the wedge of the coupling means.

This invention comprises, generally, two conduit sections, one being provided with a bore for receiving the end portion of the other, the section provided with the bore be-' ing formed with a wedge passage extending lengthwise of the bore at one side thereof and opening along one side through the wall of the bore and a wedge in the passage and having a face for gripping the end'portion of the conduit therein and preventing relative endwise displacement of the sections, the wedge 5 passage and the wedge'being so arranged relatively to the conduits that force applied to the conduits tending to separate them causes the wedge to grip tighter on the inner conduit.

1 and 2 designate, generally, the conduit sections, the section 1 being an outlet box open at one side 3, the outlet box being provided with one or more nipples as 4. The nipples here shown are at the end of the box, although it will be understood that the nipthe bottom 0 the box and are oftentimes so located.

The section 2 is an electric conduit or ipe which extends into the bore of the nip e 4. The opening 3 is covered by asuitable c osure asrtwill be understood by those skilled in the a 1 5 desi ates the wedge passa extendin lengthw i s e of the bore of the ni i gle, and it i s here shown as extending parallel to the bore of the nipple as distinguished from transversely or in an inclined position between a lengthwise and a transverse position. The passage 5 opens at its larger end into the interior of the box and tapers from its inner end towards its outer end and opens at 6 the nipple 4. As the passage 5 tapers, the wall thereof opposite the opening 6 is inclined relatively to the pipe 2 or the axis thereof. Preferably, the passage 5 is areshaped in cross section, as seen in Figure 3.

7 designates the wedge which fits the tapered passage 5 and the inner-side of the wedge, that is, the'side at the opening 6, is formed with a face or serrated face 8 for coacting with the periphery of the pipe to hold the pipe 2 and the box 1 from relative endwise movement. Said face is shown as formed with. receding teeth.

Owing to the arrangement of the wedge, any force tending to se arate the sections causes the wedge to grip tighter. Hence, the pipe 2, when suspended is ca able of suss taining considerable weight. A so, manipulation of the pipe 2 by turning it as when the workmen is assembling a conduit system will not loosen the pipe 2 from the box 1. When the cover is a plied to the open side of the box 2, the we ge 7 also is covered, or

in other words, access to the wedge is obtained only by removing the cover.

In assembling the conduit sections together, the pipe 2 is placed in the bore of along one side through the wall of the bore of I the nipple 4 and the wed 7 driven in position from the inner side 0 the box.

This couplin is particularly advantageous in that the con uit sections can be very quickly and securely coupled and the conduits cannot be removed or loosened inadvertently. Also, the pipe is capable of sustaining all the weight it may be ca led upon to su port when the conduit carries a suspended ,xture as a lamp or the like.

It will also be noted that when the wedge 7 has been driven into engagement with the conduit 2, that turning movement in either direction relative to the box 1 is revented because of the fiat surface 8 on t e wedge. This feature is im ortant as the conduit must not only be hel secured against endwise movement, but must also be held from turning movement while the workman is working on the conduit line.

What I claim is:

1. The combination of two conduit sections, one having a bore for receiving the other, the section provided with the bore being also formed with a passage extending in a direction lengthwise of the bore and opening through the wall of the bore and a wedge member slidably movable endwise into said passage and coacting with the other section where the passage opens through the wall of the bore.

2. The combination of two conduit sections, one having a bore for receiving the other, the section provided with the bore being also formedwith a passage extending in a direction lengthwise of the bore and opening through the wall of the bore and a wedge movable endwise into said passage and coacting with the other section where the passage opens through the wall of the bore, the wedge being provided with receding teeth with respect to the separating movement of the sections, said teeth engaging the periphery of the section located in the bore.

3. The combination of two conduit sections, one being provided with a bore for receiving the end portion of the other section, the section provided with the bore being formed with a passage extending in a direction lengthwise of the bore and tapering toward the outer end of the bore, said passage opening at one side through the wall of the bore and a wedge located in said passage and having a fiat serrated face for coacting with the end portion of the section in the bore where ghe passage opens through the wall of the ore.

4. The combination of two conduit sections, one being provided with a bore for receiving the end of the other section, the section provided with the bore being formed with a tapered passage extending in a direction lengthwise of the bore, said passa opening at one side through the wall of the bore, and a wedge located in said passage and having an engagin face tangent to the section in the bore an coactin with the end of the section in the bore w era the assage opens through the wall of the bore, t e wall of the passage opposite the open side of the passage being inc med relatively to the wall of the bore and the wedge conforming to the passa e.

5. he combination of two conduit sections,

one being provided with a bore for receiving the end of the other section, the section provided with the bore being formed with a tapered passage extendin in a direction lengthwise of the bore, sai passage openin at one side through the wallof the bore, an a wedge located in said passage and having an engaging face tangent to the section in the bore and coactin with the end of the section in the bore w ere the assa 0 us through the wall of the bore, the wa l o the passage opposite the open side of the passage being inclined relatively to the wall of the bore and the wedge conforming to the passage, the engaging face being serrated.

6. The combination of two conduit sections, one being provided with a bore for receivin the end portion of the other section and wit a passage extending lengthwise of the bore and opening along one side thereinto, said passage being tapered and arranged with its smaller end toward the outer end of the bore and a wedge complemental to the passage and having a flat serrated face for coacting with the end portion of the section in the bore where the wedge assa e opens through the wall of the bore or ho ding the section extending into the bore, from lengthwise and rotatable movement relative to the other section.

7. The combination of two conduit sections, one being a box open at one side and provided with a nipple in a side thereof other than the open side, the nipple having a bore opening into the interior of the box, and the other section being a pipe having its end portion extending into the nipple, the box being formed with a tapering wedge passa extending in a direction lengthwise of t e nipple and opening at its larger end into the interior of the box, said passage 0 ening through the inner wall of the bore of t e nipple and a wed e located in said passage and removable an replaceable from the wed e passage through the open side of the box, the wedge having a flat serrated face for coacting with the pipe to grip the same where the wedge passage opens into the nipple.

8. The combination of two conduit sections, one having a bore for receiving the end portion of the other, the section formed with the bore being formed with a passage extending lengthwise of the bore and opening at one side into the bore, said passage being arcshaped in cross section and taperin toward the outer end of the bore and a w ge member complemental to and slidably movable in said passage and having a. serrated face for coacting with the section extending into the bore where the passage opens into thebore for preventing outward and rotatable relative movement of the sections.

In testimony whereof, I have hereunto signed my name, at Syracuse in the count of Ononda a, and State of flew York, the 15th day 0 August, 1929.

JAY W. MCCOY. 

